Máy đo lưu lượng khí FT3 - Fox Thermal

Technical Specifications

Fox Thermal Model FT3 Thermal Mass Flow Meter & Temperature Transmitter

Performance Specs

Type

Insertion

Inline

Flow Accuracy:

± 1% of reading ± 0.2% of full scale.
15 diameters of straight, unobstructed pipe upstream and 10 downstream.

± 1% of reading ± 0.2% of full scale.
8 diameters of straight, unobstructed pipe upstream and 4 downstream.

Flow Repeatability:

± 0.2% of full scale

Flow Response Time:

0.9 seconds (one time constant)

Temperature Accuracy:

± 1.8°F (± 1.0°C) -40 to 250°F (-40 to 121°C); ± 3.6°F (± 2.0°C), 250 to 650°F (121 to 343°C); 60 SFPM minimum.

Calibration:

Factory Calibration to NIST-traceable standards
CAL-V™ and Zero CAL-CHECK®: In situ, operator-initiated calibration validation

Operating Specs

Type

Insertion

Inline

Flow Units (field selectable):

SCFM, SCFH, NMPS, NM3/M, NM3/H, NM3/D, NLPS, NLPM, NLPH, MCFD, MSCFD, SCFD, MMSCFD, MMSCFM, SMPS, SM3/H, LB/S, LB/M, LB/H, LB/D, KG/S, KG/M, KG/H, SLPM, SFPM, MT/H, SM3/M

Flow Rates:

15 to 60,000 SFPM (0.07 to 280 NMPS) - Air at 70°F (20°C) & 1 ATM

Turndown:

up to 1000:1; 100:1 typical

Flow Ranges:

Note: Standard conditions of air at 70°F and one atmosphere.
Consult factory for other gases, pipe sizes, and flow ranges other than those listed.

Gas Pressure (max):

500 psig (34.5 barg)

316 SS inline w/NPT ends: 300 psig (20 barg)
316 SS inline w/150lb flanges: 230 psig (16 barg)
CS inline w/NPT ends: 300 psig (20 barg)
CS inline w/150lb flanges: 285 psig (20 barg)

Check with factory for higher pressure options.
Note: Pressure ratings stated for temperature of 100°F (38°C).

Relative Humidity:

90% RH maximum; non-condensing

Temperature by Sensor Type: (see Approvals tab)

ST Sensor: -40 to 250°F (-40 to 121°C)
HT Sensor: -40 to 650°F (-40 to 343°C)

Temperature by Enclosure: (see Approvals tab)

Without display or AC power supply: -40 to 158°F (-40 to 70°C)
With display and/or AC power supply: -4 to 158°F (-20 to 70°C)
Remote sensor junction box: -40 to 212°F (-40 to 100°C)

Inputs Power:

• 24 VDC (±10%), 0.7 Amps (standard DC Power) 100 to 240VAC ∼(+10%-15%), 50-60Hz, 0.2 Amps (with AC power option).

Note: Fluctuations of AC and DC power supply are not to exceed ±10% of rating.
Class I Equipment (Electrical Grounding Required for Safety).
Installation (Over-voltage) Category II for trnasient over-voltages.

Inputs/Outputs:

• All outputs and communication circuits are galvanically isolated.
• 4-20mA output one is proportional to the measured flow rate.
• Fault indication per NAMUR NE43.
• 4-20mA output two is programmable for temperature or flow rate.
• Digital output one is programmable for either pulse (for totalizing flow) or alarms.
• Output is open collector type, operating voltage 5V to 24V, maximum sinking current: 10mA.
• The pulse output is proportional to flow rate with a range of 0 to 100Hz.
• When configured for alarm, the digital output generates an on or off signal.
• Remote switch input can be configured to reset elapsed time, flow totalizer or switch between gas curves when the 2 gas curve option is ordered.

Port:

Mini USB communication port is standard.

Software:

The free PC-based software tool - FT3 View™ - provides complete configuration, remote process monitoring, and data logging functions.

Optional serial communication:

HART or Modbus RTU (RS485).

4-20mA Loop Verification:

Simulation mode used to align 4-20mA output with the input to customer’s PLC/DCS.

Physical Specs

Type

Insertion

Inline

Sensor Material:

316 stainless steel standard. Hastelloy C276 optional.

Enclosure:

NEMA 4X (IP68), Aluminum, dual conduit entries with ¾" NPT or optional M20 x 1.5mm.
Cabling to remote enclosure: 5-conductor, 18 AWG, twisted, shielded, 100 feet maximum.

Retractor Assemblies:

Packing gland assembly: 125 psig (8.6 barg ) max.
High pressure (crank) retractor: NPT 600 psig (41.4 barg), ANSI 150 flange & ANSI 300 flange, no valve supplied.

Installation:

Fox Thermal-supplied compression fitting connects to customer-supplied ¾" female coupling welded to pipe.

Compression fitting included with flow body.